Dear Sir

V got a 2 axis turning center with Fanuc 0i T

When machine is put ON, it goes into "System Monitor Service Menu" and when we press END, then "ROM parity error NC Basic Hit Select "appears

When we try to take SRAM backup, error "Memory card mount error" appears - same error even after "Memory card format" and even with another memory card (ie Flash card adapter with 1GB memory card)

On CPU, 2nd row status center Red LED(out of 3) on bottom row gets ON, all the 4 green LEDs on top row are ON

a) We have completely cleaned Main CPU - No effect

b) We have removed all cables except cables for CRT and MDI from CNC - just to avoid effect of external I/Os, encoder cables etc No effect

c) On the back panel, few pins on PCB have black (burning like) impression

Due to the above, we feel back panel is faulty causing all the problems mentioned above

Request to go thro all the points and confirm if our observation is correct

Warm regards